Different runlevels in HP-UX

Various runlevel in HP-UX are as follow

0  – In this runlevel System is halted.

S  – Single-User mode, boots to system console only, and only root   filesystem is mounted as read only

s –  Single-User mode, identical to S except the current terminal acts as the system console

1 – Single-User mode with local filesystems mounted (read-write)

2 – Multiuser mode with most demons started.Only the NFS is not enable

3 – It is same as Runlevel 2 , but in this runlevel NFS is enable

4 – This is a multiuser mode with VUE started instead of CDE.

5,6 – Not used